Even the always-put-together Lady Gaga wasn't immune to a lack of traction. Her "Monster Ball" tour kicked off in Montreal last night (November 29), and as promised, it was a fantastically theatrical, over-the-top production that featured incredible costumes (including one outfit made entirely out of firearms) and muscular dancing. But at the beginning of "Teeth" (the excellent, tough final track on the new EP The Fame Monster), Gaga fell into formation with her dancers ... and then fell down. Since she's a consummate professional, so she got right back up and picked up the choreography where she left off.

"The Monster Ball" — which also features opening sets by Kid Cudi and Jason DeRulo — continues tomorrow night (December 1) in Boston and will keep her on the road until the end of January. After that, "The Monster Ball" goes international, as she will take the tour to the U.K., Australia and Japan.